It turned out to be gold. The woman and her husband — residents of the town of Whitehall — found gold flecs in their tap water. “That couldn’t possibly be gold, huh? And I was sure it wasn’t,” Mark Brown told NBC News, which visited the couple’s home and observed the glittering gold in their tap water.

After performing tests on the flakes, the Browns confirmed that they were composed of gold. But they have no idea how the gold is getting into their tap water. Their next-door neighbor says he also sees gold flakes in his tap water.

While discovering gold in one’s tap water might excite some people, the Browns are worried. If there’s gold — a heavy metal — visible in their tap water, they wonder, what other contaminants aren’t they seeing?

Local officials say there is nothing wrong with the local tap water. There is a gold mine located five miles outside of town, but officials doubt that the gold seen in the tap water came from the mine. A state officials suggested that the gold in the tap water might have come from pipes or pumping equipment.